Restoring natural mineral levels in grassland reinvigorates pastures that would otherwise be ploughed up and re-seeded. A mixture of native and introduced grass species is perfectly capable of taking up mineral nutrients once those minerals have been restored to the soil. Ironically, many of these are better in this respect than tetraploid hybrids (which are also nitrogen-hungry). Not having to plough and re-seed is not only environmentally friendly but also saves money (The Farmers Guardian estimated the cost to be over £300 per hectare back in 2007).